The evolution of the European criminal law through international justice. What relationship and connection exists between them?

Abstract: The aim of this work is to show the continuous relationship of cooperation and collaboration of two giants who play in different ways both from a political and legal point of view, two different systems of preservation and protection of human rights as well as the continuous fight against impunity. On the one hand, this occurred through a continuous evolution of the European Union towards a system of integration, stability, cohesion of old and new objectives for European justice. On the other hand, through the international arena where with the help of the EU it plays an important, direct and concrete role in the international justice that goes beyond the past and plays a more collaborative, cooperative role on a global level with an international organization like the Union which many years ago was just an unrealizable dream.